I have two cartridges with the ROM and it works really good on a real GameBoy Color, but I don't think many people would buy it, so these copies are not for sell. Sorry :(
Viewing post in InitialD - GameBoy Color comments
Hm, I bet there would be some interest in a physical cartridge, especially if you posted on Twitter, or some place like nintendoage.com
I know I would be. If you ever decide to make some for sale, or are ever willing to sell one of the ones you have, or you are interested in releasing it, but want help/someone to help you release and distribute it, let me know/In an point you in the right direction :)